dsp56800 Freescale Semiconductor, Inc, dsp56800 Datasheet - Page 147

• Manufacturer Part Number: dsp56800
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

Table 6-16 shows the register set available for use in data ALU arithmetic operations. The most common
field used in this table is FDD.
6.6.2
Immediate values, including absolute and offset addresses, are utilized in the instruction set summary
using the notation defined in Table 6-17. The <MASKx> notation is used in Bit Manipulation Instructions
in Table 6-30 and Table 6-31. The <OFFSET7> and <ABS16> notations are used in change of flow and
loop intructions in Table 6-32 and Table 6-33.
6.6.3
This section contains helpful information on using the summary tables. It contains some notation used
within the tables.
The register field notation is found in Section 6.6.1, “Register Field Notation.”
Freescale Semiconductor
Register Field
F1DD
FDD
~F,F
DD
F1
F
Immediate Value Notation
Using the Instruction Summary Tables
Immediate Value Field
Registers in This Field
<OFFSET7>
<MASK16>
<MASK8>
X0, Y0, Y1
X0, Y0, Y1
X0, Y0, Y1
<ABS16>
A1, B1
A1, B1
A, B
A, B
Table 6-17. Immediate Value Notation
Table 6-16. Data ALU Registers
Instruction Set Introduction
Five data ALU registers — two 36-bit accumulators and three 16-bit data
registers accessible during data ALU operations
Contains the contents of the F and DD register fields
Five data ALU registers — two 16-bit MSP portions of the
accumulators and three 16-bit data registers accessible during data ALU
operations
Three 16-bit data registers
Two 36-bit accumulators accessible during parallel move instructions and
some data ALU operations
~F,F refers to any of two valid accumulator combinations: A,B or B,A
The 16-bit MSP portion of two accumulators accessible as source operands
in parallel move instructions
8-bit mask value
16-bit mask value
7-bit signed PC-relative offset
16-bit absolute address
Description
Comments
DSP56800 Instruction Set Summary
6-15